Frictional vibration damper



April 7, 1931. P. E. MATTHEWS. 1,799,630

FRICTIONAL VIBRATION DAMPER Filed Dec. 30, 1929 a I e M W *1 Ida a z A a \y s 3 V mm 0 d I J I 09 L I a J 4 3 C b a; .f/ d

f Q g lvwontoz:

in torsional stresses upon the shafts. The

Patented Apr. 7, 1931 4 UNITED STATES PHILIP E. MATTHEWS, or PLAINFIELD, NEW JERSEY, ,nssisnon'ro mrERNATIoiTAI.

moron COMPANY, or NEW YORK, N. Y,, a oonrone'rron or mznewnn'n I FRICTIONAL vinmrron ne vrrna j ,l

Application filed December 30, imper al-1'1... 417,357."

The present invention relates to vibration dampening means for rotatable elements and members, more specifically, an improved torsional vibration damper adapted particularly for multiple disc clutches.

As is commonly known, considerable vibration is set up in rotatable elements, particularly the crank shaft, etc. of motor vehicles, such vibration resulting from variations undesirable engine vibrations are now commonly damped by means of various forms of dampers, these being separate elements interposed between shaft sections or mounted directly on said sections.

The present invention relates more particularly to a vibration dampening means which is incorporated directly in the usual clutch construction of motor vehicles, the elements of the present invention being embodied in nates' a driving member, such as the crank shaft of an engine, uponwhich a fly-wheel b --1smounted by means of bolts a". This1 flythe usual clutch constructions now in service. In connection with this structure, it is proposed to combine the dampening effect of a resilient connection between relativelyrotat able members with a light effect produced by frictional means carried by one member and.

tively by a construction of the above charac-f ter than the result obtained by merely interposing a resilient connection between rotatable elements of the driving mechanism of a motor vehicle.

An object of the invention, accordingly, is I to provide a vibration dampening means which is highly efiective in dampening out the undesirable engine vibrations noted above. I

A further object of the invention is to pro:

vide a dampening means of the above characcorporate in a clutch construction, friction mentsbetween which aresilient connection is provided aswell as a 'fI'ICtlOIlELl connection;

. "Further objects, not specifically enumerat relatively from. l

ed above,vwill be apparent as the invention is 7 described in greater detail in'zconnectionf with the accompanying drawingsgwherein 1 V i Figurel' is a view in transverse-section,

takentthrou'gh the axis-of a clutch constructed in accordance with the present invention.

- :1 Figure 2 isfarview in section, taken on line 2420f Figurel and lookingin the direction ofthearrows. 3 v

Referring to the'above drawings, a desigwheel carriesa cylindricalf'member 0 which preferably forms a clutch housing and with in which a'concentric sleeved-is mounted; Suitable recesses 0 are formed in'the housing c' and receive lugs cl within which re cesses d rareformed. wSprings e are seated within the recesses and yieldingly engage the sidewalls: of the recesses 0", thus yieldingly opposing relative movement ofthe sleeve 03 with respect tothe housing 0." i Spaced'ribs d are formed within the sleev'e d andare engaged by similarly formed ribs fupon friction'plates- Y driving'shaft a,-carries a spider 9? upon which discs g are keyed. Friction 'discs 'ltf a're 'mounted between the discs g and f in the usual manner and a spring 9% may be "utilized A driven shaft fg, journaled 'atgin the I tocau'se'the plates and discs-to be normally I engaged or disengaged. The specific engagv These studs are threaded and receive nuts z" against which leaf springs j are seated.

The studs 71 extend through clearances k 111*100 the housing 0 and thus permit a degree of movement of the sleeve with respect to the housing. At the extremities of the spring j, friction pads y" are mounted, these pads engaging the periphery of the housing a to resist relative-movement between suchhousing and thesle'eve :d. The force of-thespring: j upon the pads 9' may be varied by adjusting, the nuts '11 as will be quite apparent.

m From the'foreg0ing,itwill*be-seenthat the" friction-"pads jprod'uce a'dampening friction between the members 0 and.d,.thus.dampa v r ening the undesirable engine vibrations'transmitted to the housing =0. and preventingtheir;

15 transmission to the damper elements. While the inventiomhas been described-with; specific reference to the accolnpanyin drawings,=it is not'to'be limitedsave as .de ned in .the appended claims; a g

g9 wihatIclai'misz 'tl .1. A'deviceof thecharacter'described comprising relatively vrotatable members, aresilientmeanstoresist relative rotation between the members,.a\radial stud carried by one-of g5 themembers,aaxresilient element on thestud, friction-means on the resilient element en gaging the othermember and means .to adjust theresilient means radially. V

2. A device of: he character described-coma0 prisingvrelatively rotatablemembers, aqresilient means to resist relative rotation between I 1- the members awstudz carriedby one of the a members, a clearance in'the' other member 7 through which the stud extends, a resilient 13p element on the'stud,zandfriction means onthe :resilient element engaging the: other member.

'3. .A device iof-the'character described comrising: relatively Irotatable. concentric .mem-

- ers,-resilientmeanstoresist relativerotation in between 'the:members, one;ofthe membersxbe ingoformedwith.c1earances,'studs on theother meniberextending through the clearances-,- resilient: strips on the studs, and friction pads on the strips engaging the other member. .4 .v

5 '4. A device of the character described comfizisi'ng relatively. rotatable concentric memrs, res-ilient-meanstoresist. relative rota-v I 7 tion between the-membersyoneofthe membersabeing formediwith clearances, studs on 150 the other:lmembers.wextendingl through the clearances, resilient strips on the :studs,.:friction pads on-the-stripsengaging, the other member, and means to adjust uthe tension of the resilient strips.

5 This specification-signed 'this23rd day of DecemberArD. .1929. r a v I PHILIPUEVM'ATTHEWS. 

